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Simple Heating System Size: Washington State <br /> TFtfs heating system sizing calculator is based on the Prescriptive Requirements of the 2015 Washington State Energy Code(WSEC)and ACCA <br /> Manuals J and S. This calculator will calculate heating loads only.ACCA procedures for sizing cooling systems should be used to determine coolinq <br /> loads. <br /> The glazing(window)and door portion of this calculator assumes the installed glazing and door products have an area weighted average U-factor of <br /> 0.30. The incorporated insulation requirements are the minimum prescriptive amounts specified by the 2015 WSEC. <br /> Please fill out all of the green drop-downs and boxes that are applicable to your project.As you make selections in the drop-downs for each section, <br /> some values will be calculated for you. If you do not see the selection you need in the drop-down options, please call the WSU Energy Extension <br /> Program at(360)956-2042 for assistance. <br /> Project Information Contact Information <br /> Wilkinson American Home Planners <br /> (425)258-6400 <br /> Heating System Type: (I All Other Systems 0 Heat Pump <br /> To see detailed instructions for each section,place your cursor on the word"Instructions". <br /> Design Temperature <br /> - - — Design Temperature Difference(AT) 47 <br /> Everet JC Vi <br /> AT=Indoor(70 degrees)"Outdoor Design Temp <br /> • Area of Building <br /> Conditioned Floor Area <br /> Instructions Conditioned Floor Area(sq ft) 3,383 <br /> Average Ceiling Height Conditioned Volume <br /> Instructions Average Ceiling Height(ft) 8.0 27,064 <br /> Glazing and Doors U-Factor X Area = UA <br /> Instructions <br /> 0.30 351 105.30 <br /> Skylights U-Factor X Area = UA <br /> Instructions 0.50 <br /> Insulation <br /> Attic U-Factor X Area = UA <br /> Instructions R-49 0.026 2,235 58.11 <br /> Single Rafter or Joist Vaulted Ceilings U-Factor X Area UA <br /> Instructions Co Vaulted Ceilings In this project <br /> Above Grade Walls(a..Figure 1) U-Factor X Area UA <br /> Instructions (11_21lntennedt♦ate 0.056 3,288 184.13 <br /> Floors U-Factor X Area UA <br /> Instructions <br /> R 30 0.029 1,438 41.70 <br /> Below Grade Walls(age Figure 1) U-Factor X Area UA <br /> No Below Grade Walls In this project. V '— <br /> Slab Below Grade(see Figure 1) F-Factor X Len th UA <br /> No Slab Below Grade In this project Slab on Grade(see Figural) F-Factor X Len h UA <br /> No gab on Grade In this project. V_... <br /> Location of Ducts <br /> Duct Leakage Coefficient <br /> Unconditioned Space v <br /> 1.10 <br /> Sum of UA 389.24 <br /> Envelope Heat Load 18,294 Btu/Hour <br /> Figure 1. Sum ofUAXAT <br /> Air Leakage Heat Load 13,738 Btu/Hour <br /> VolumeX 0.6XATX.018 <br /> Above Grade Building Design Heat Load 32,032 Btu/Hour <br /> Alr Leakage*Envelope Heat Lose <br /> Building and Duct Heat Load 35,235 Btu/Hour <br /> Ducts in unconditioned space:Sum of Building Heat Loss X 1.10 <br /> Ducts in conditioned space:Sum of Building Heat Loss X 1 <br /> Maximum Heat Equipment Output 49,329 Btu/Hour <br /> Building and Dud Heat Loss X 1.40 for Forced Air Furnace / 3 <br /> Building and Duct Heat Loss X 1.25 for Heat Pump <br />